EP0451093A1 - Composite métallique à point de fusion élevé - Google Patents

Composite métallique à point de fusion élevé Download PDF

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Publication number
EP0451093A1
EP0451093A1 EP91810183A EP91810183A EP0451093A1 EP 0451093 A1 EP0451093 A1 EP 0451093A1 EP 91810183 A EP91810183 A EP 91810183A EP 91810183 A EP91810183 A EP 91810183A EP 0451093 A1 EP0451093 A1 EP 0451093A1
Authority
EP
European Patent Office
Prior art keywords
melting
metal
powder
compound
reaction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91810183A
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German (de)
English (en)
Inventor
Günther Höllrigl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alusuisse Lonza Services Ltd filed Critical Alusuisse Lonza Services Ltd
Publication of EP0451093A1 publication Critical patent/EP0451093A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0408—Light metal alloys

Definitions

  • the invention relates to a process for the production and deposition of a high-melting metallic compound by atomizing an elementary or alloyed metal melt flowing from a crucible into an atomizing device by means of at least one gas stream directed towards the outflowing metal and with the simultaneous addition of a high-melting, powdery solid the mixing zone designed as a spray zone, the material sprayed by the gas stream being directed as a substantially conical spray jet with partial reaction towards a deposition surface where the reaction takes place completely.
  • the invention further relates to an application of the method.
  • the spray deposition of molten elemental metal or a molten alloy with a gas flowing in under high pressure is known per se.
  • the resulting coatings or moldings have a relatively high porosity, which can vary depending on the spray conditions and the spray gas used.
  • the invention has for its object to provide a method of the type mentioned, which allows the synthesis of a high-melting compound, which can be controlled with different parameters with respect to the course of the reaction.
  • the object is achieved according to the invention in that by controlling the temperature of the molten metal flowing out of a nozzle and the gas / metal flow ratio of an inert gas supplied under high pressure by forming the connection between the powdered solid and the partially liquid melt drops of the atomized Metal melt produces an exothermic reaction and is maintained.
  • connection through an exothermic enthalpy of reaction of the metallic connection is of essential importance when a high-melting connection is formed.
  • This consequently has the technological advantage that the low-melting component of the intermetallic compound can be atomized at low temperatures.
  • This metal is also called matrix metal.
  • Suitable matrix metals are primarily aluminum and aluminum alloys and other metals with a low melting point, e.g. Magnesium.
  • the second component of the compound to be produced is a high melting point element or a metal which is difficult to melt metallurgically, e.g. because, as in the case of titanium, the melt is very reactive and / or has a high melting point, in particular in the case of the elements titanium, vanadium, manganese, chromium, iron and nickel which are important for the production of intermetallic compounds.
  • the volume fraction of the liquid phase of the finely sprayed matrix metal in droplet form must be controlled in the reaction phase so that - in cooperation with the likewise controlled metal temperature and the volume of inert gas supplied - the required exothermic reaction between the deposited droplets of the matrix metal and the high-melting powder can occur.
  • the proportion of the high-melting powder, in particular an elementary solid phase, is preferably also adjusted to the stoichiometry of a desired intermetallic compound.
  • a desired intermetallic compound For example, single-phase intermetallic compounds are generated.
  • Nitrogen, argon and / or helium which are fed in at high pressure, are particularly suitable as inert gases for spraying the outflowing metal jet.
  • the pressure to completely atomize the molten metal is, for example, in the range from 2 to 10 bar.
  • the method for producing an intermetallic compound of a low-melting matrix metal with at least one high-melting powder is used.
  • aluminide phases of the Al 3 X type are produced from aluminum or an aluminum alloy and a powdery component X, where X consists for example of Ti, V, Ti + V, Ti + Mn, Ti + Fe or Ti + Cr.
  • X denotes the elements Fe, Mn, Cr, V in the y range from 6 to 15 atomic%.
  • the process is also suitable for the production of a solid consisting of a phase mixture of intermetallic compound (eg Al3Ti with 70 to 99% by volume) and an Al mixed crystal which solidifies rapidly from the melt and which contains the compound-forming elements (eg Ti in the case of Al3Ti) contains supersaturated solid solution.
  • a phase mixture of intermetallic compound eg Al3Ti with 70 to 99% by volume
  • an Al mixed crystal which solidifies rapidly from the melt and which contains the compound-forming elements (eg Ti in the case of Al3Ti) contains supersaturated solid solution.
  • FIG. 1 shows schematically a device for performing the method in longitudinal section.
  • a crucible 10 with a ceramic nozzle 12 contains molten metal, in the present case an aluminum alloy heated to over 700 ° C. When the stopper is open, it flows downward and forms a jet 16 of molten metal 14.
  • High-melting powder 22 is guided in the direction of an annular primary nozzle 24 by means of an inert transport gas, which is represented by an arrow 20, over two horizontal delivery channels 18. From this vertically oriented nozzle, the high-melting powder 22, at most mixed with powdered, reacted product as a coolant, flows vertically along the jet 16 under discrete inert gas pressure.
  • the high-melting powder 22 consists, for example, of titanium, titanium + vanadium, titanium + iron, titanium + chromium, titanium + manganese.
  • the inert gas 28 is thrown over at least one opening 30 in the direction of the metal jet 16 and the high-melting metal powder 22.
  • the jet 16 of molten metal is sprayed into fine droplets and whirled through with the high-melting metal powder 22.
  • this mixing zone 32 also called atomization or spraying zone, the reaction with exothermic enthalpy of reaction already begins to take place, namely when a melt droplet accidentally collides with an introduced reactive powder grain of the high-melting powder 22.
  • a spray jet 34 formed next to the mixing zone 32 applies a liquid film on the surface to a collector 36 rotating about an axis A or a layer deposited thereon from the high-melting metallic compound 38 formed as a reaction product.
  • the reactions in the mixing zone 32 and the atomizing jet 34 are practically negligible; however, the prerequisites for a homogeneous reaction product are laid here.
  • the liquid film initially deposited directly on the collector 36 can grow into a full, dense body.
  • the rotating collector 36 is lowered to the extent that the deposited layer thickness increases.
  • the reaction level formed by the liquid film thus remains at a constant level.
  • objects arranged on the collector 36 can be coated; in this case the response time is relatively short.
  • Dashed lines 40 indicate that a portion of the inert gas 28, loaded with fine-grained powder, is returned to the high-melting powder 22 falling into the mixing zone 32.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
EP91810183A 1990-04-04 1991-03-20 Composite métallique à point de fusion élevé Withdrawn EP0451093A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH113090 1990-04-04
CH1130/90 1990-04-04

Publications (1)

Publication Number Publication Date
EP0451093A1 true EP0451093A1 (fr) 1991-10-09

Family

ID=4203199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810183A Withdrawn EP0451093A1 (fr) 1990-04-04 1991-03-20 Composite métallique à point de fusion élevé

Country Status (1)

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EP (1) EP0451093A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2721231A1 (fr) * 1994-06-21 1995-12-22 Wheelabrator Allevard Procédé d'atomisation d'un matériau liquide dispersable.
EP1176227A1 (fr) * 2000-07-26 2002-01-30 DaimlerChrysler AG Procédé pour la formation d'une couche superficielle
CN111424192A (zh) * 2020-04-26 2020-07-17 江苏华企铝业科技股份有限公司 一种铝锶合金分次熔炼成型工艺
CN111468737A (zh) * 2020-03-07 2020-07-31 福达合金材料股份有限公司 一种粉体制备与混粉一体化装置及其应用
CN113399671A (zh) * 2021-06-18 2021-09-17 中南大学 一种制备纳米颗粒增强金属基复合粉末的气雾化喷盘

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179369A (en) * 1985-08-06 1987-03-04 Secretary Trade Ind Brit Sintered aluminium alloy
EP0256450A1 (fr) * 1986-08-12 1988-02-24 BBC Brown Boveri AG Procédé de fabrication d'ébauches compactées à résistance élevée et densité relativement faible à partir d'un alliage d'aluminium résistant à la chaleur
EP0262869A1 (fr) * 1986-09-24 1988-04-06 Alcan International Limited Poudre composite en alliage d'aluminium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179369A (en) * 1985-08-06 1987-03-04 Secretary Trade Ind Brit Sintered aluminium alloy
EP0256450A1 (fr) * 1986-08-12 1988-02-24 BBC Brown Boveri AG Procédé de fabrication d'ébauches compactées à résistance élevée et densité relativement faible à partir d'un alliage d'aluminium résistant à la chaleur
EP0262869A1 (fr) * 1986-09-24 1988-04-06 Alcan International Limited Poudre composite en alliage d'aluminium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 26 (M-112)[904] 16. Februar 1982; & JP-A-56 142 805 (KOBE SEIKOSHO) 7. November 1981 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2721231A1 (fr) * 1994-06-21 1995-12-22 Wheelabrator Allevard Procédé d'atomisation d'un matériau liquide dispersable.
WO1995035158A1 (fr) * 1994-06-21 1995-12-28 Wheelabrator Allevard Procede d'atomisation d'un materiau liquide dispersable
EP1176227A1 (fr) * 2000-07-26 2002-01-30 DaimlerChrysler AG Procédé pour la formation d'une couche superficielle
CN111468737A (zh) * 2020-03-07 2020-07-31 福达合金材料股份有限公司 一种粉体制备与混粉一体化装置及其应用
CN111424192A (zh) * 2020-04-26 2020-07-17 江苏华企铝业科技股份有限公司 一种铝锶合金分次熔炼成型工艺
CN111424192B (zh) * 2020-04-26 2021-10-15 江苏华企铝业科技股份有限公司 一种铝锶合金分次熔炼成型工艺
CN113399671A (zh) * 2021-06-18 2021-09-17 中南大学 一种制备纳米颗粒增强金属基复合粉末的气雾化喷盘

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